// sizeof里边放数组名，传首元素地址
#include <stdio.h>
void example(char acHello[])
{
printf("%d\n", sizeof(acHello));
return 0;
}
int main()
{
char acHello[] = "hello,tu_lun";
example(acHello);
return 0;
}
原文：http://blog.csdn.net/zhaoyaqian552/article/details/45581957